Yashica Electro 35 GSN arrived

GSN arrived! Battery included (Energizer E164). Power light is green, shutter fires every time. Self timer works. Only issue (I think) is turning the aperture ring does not open/close the aperture within the lens.

Should it work like a SLR lens?

I read a post on a fb group, perhaps the blades remain shut to avoid expsoing the film when the shutter is not being pressed? Seems logical.

Any rangefinder users in here?

Finally finished the first roll today, it's already at the lab for processing. Fingers crossed.